Display screen or a portion thereof with graphical user interface



FIG. 1 is a front view of a display screen or a portion thereof with graphical user interface showing the new design; and,

FIG. 2 is a front view showing a second embodiment thereof.

The outermost solid-line perimeter illustrates a display screen or portion thereof.

The broken lines illustrate portions of a graphical user interface and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 